/*
 * (C) Copyright 2005- ECMWF.
 *
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
 *
 * In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
 * virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
 */

/**************************************
 *  Enrico Fucile
 **************************************/


#include "grib_api_internal.h"

/* 
   This is used by make_class.pl

   START_CLASS_DEF
   CLASS      = expression
   IMPLEMENTS = destroy
   IMPLEMENTS = native_type
   IMPLEMENTS = evaluate;print
   IMPLEMENTS = add_dependency
   MEMBERS    = long value
   END_CLASS_DEF

 */
/* START_CLASS_IMP */

/*

Don't edit anything between START_CLASS_IMP and END_CLASS_IMP
Instead edit values between START_CLASS_DEF and END_CLASS_DEF
or edit "expression.class" and rerun ./make_class.pl

*/

typedef const char* string; /* to keep make_class.pl happy */


static void init_class(grib_expression_class*);

static void destroy(grib_context*, grib_expression* e);

static void print(grib_context*, grib_expression*, grib_handle*);
static void add_dependency(grib_expression* e, grib_accessor* observer);

static int native_type(grib_expression*, grib_handle*);


typedef struct grib_expression_constant
{
    grib_expression base;
    /* Members defined in constant */
    long value;
} grib_expression_constant;


static grib_expression_class _grib_expression_class_constant = {
    0,                                /* super                     */
    "constant",                       /* name                      */
    sizeof(grib_expression_constant), /* size of instance          */
    0,                                /* inited */
    &init_class,                      /* init_class */
    0,                                /* constructor               */
    &destroy,                         /* destructor                */
    &print,
    &add_dependency,

    &native_type,
    0,

    0,
    0,
    0,
};

grib_expression_class* grib_expression_class_constant = &_grib_expression_class_constant;


static void init_class(grib_expression_class* c)
{
}
/* END_CLASS_IMP */

static long evaluate(grib_expression* g, grib_handle* h)
{
    grib_expression_constant* e = (grib_expression_constant*)g;
    return e->value;
}

static void print(grib_context* c, grib_expression* g, grib_handle* f)
{
    grib_expression_constant* e = (grib_expression_constant*)g;
    printf("constant(%ld)", e->value);
}

static void destroy(grib_context* c, grib_expression* g)
{
    /* grib_expression_constant* e = (grib_expression_constant*)g; */
}


static void add_dependency(grib_expression* g, grib_accessor* observer)
{
    /* grib_expression_constant* e = (grib_expression_constant*)g; */
}
